package com.example.tianhao.spinnertest413th;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private TextView tv;
    private Spinner sp;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        String[] cities={"北京","上海","天津","大连"};
        ArrayAdapter<String> adapter=new ArrayAdapter<String>(
                this,
                android.R.layout.simple_spinner_item,
                cities
        );
        adapter.setDropDownViewResource(
                android.R.layout.simple_spinner_dropdown_item
        );
        sp.setAdapter(adapter);
        sp.setPrompt("请选择城市;");
        sp.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                tv.setText("您的选择是："+adapterView.getItemAtPosition(i).toString());
            }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {

            }
        });
    }
    private void init()
    {
        tv=(TextView)findViewById(R.id.textView);
        sp=(Spinner)findViewById(R.id.spinner);
    }
}
